pdf如何加水印(给PDF文档添加水印的小技巧)
你好，其实给PDF添加水印并没有什么特别的技巧，由于PDF的特殊性，阅读与编辑都不是在一个软件上进行的，像您这种问题，需要用到的是PDF编辑器。一起来看看是如何使用PDF编辑器给PDF添加水印的吧！
工具下载：
https://www.callmysoft.com/pdfbianji
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